本文選題：瓦斯 + 柱狀煤芯��； 參考：《中國安全生產(chǎn)科學技術》2017年07期

【摘要】：為研究溫度壓力對吸附飽和度和進擴散時間的影響,以確定實驗室內(nèi)不同溫壓下原煤煤芯可接受的吸附飽和度和進擴散時間,建立了柱狀煤芯瓦斯擴散模型,采用φ50mm×100mm的柱狀煤芯開展了不同溫壓下的瓦斯擴散實驗。經(jīng)實驗檢驗,模型能很好描述原煤柱狀煤芯的瓦斯擴散過程。計算了不同溫壓下柱狀原煤煤芯達到不同吸附飽和度所需的吸附進擴散時間和不同時間的瓦斯質(zhì)量濃度分布。結果表明:溫度越高,擴散系數(shù)越大,吸附平衡時間越短;壓力越高,擴散系數(shù)越小,吸附平衡時間越長�？紤]實驗精度要求和可接受時間,在30~40℃,瓦斯壓力0.5~3MPa的范圍內(nèi),建議滲流實驗吸附飽和度為80%,吸附時間為6~8 d;精度要求較高的擴散實驗,吸附飽和度為90%,吸附時間為10~12 d。
[Abstract]:In order to study the effect of temperature and pressure on adsorption saturation and inlet diffusion time, and to determine the acceptable adsorption saturation and diffusion time of raw coal core under different temperature and pressure in laboratory, a gas diffusion model for columnar coal core was established. The gas diffusion experiments under different temperature and pressure were carried out with 蠁 50mm 脳 100mm columnar coal core. Experimental results show that the model can well describe the gas diffusion process of the cylindrical coal core. The absorption diffusion time and gas mass concentration distribution at different temperature and pressure were calculated for the core of columnar raw coal to achieve different adsorption saturation. The results show that the higher the temperature, the greater the diffusion coefficient and the shorter the adsorption equilibrium time, and the higher the pressure, the smaller the diffusion coefficient and the longer the adsorption equilibrium time. Considering the requirement of experimental precision and acceptable time, in the range of 30 鈩，

本文編號：1782149